| 摘要 |
PURPOSE:To obtain hydroxy apatite having a desired Ca/P ratio in good reproducibility, by adding quicklime and/or slaked lime to slurry of CaHPO4.2H2 O and water, and aging a reaction product. CONSTITUTION:CaO and/or Ca(OH)2 is gradually added to and reacted with slurry of CaHPO4.2H2O and water while keeping pH<=10, temperature at 5-70 deg.C optionally in an inert gas atmosphere such as N2, etc. until it reaches 80wt% theoretical amount added and the rest of CaO and Ca(OH)2 is added to the reaction mixture, the reaction mixture is aged at >=60 deg.C aging temperature for >=0.5hr, a solid reaction product is separated by a means such as filtration, etc., and an excess amount of Ca(OH)2 is washed and removed, to give hydroxy apatite useful as a material for biological use, etc.
|
